Re-signed 2.10.11 tarballs

[Mark Doliner]

Hi! The Pidgin source 2.10.11 tar.gz and tar.bz2 files were originally
signed with my old PGP key. I created a new key in 2013 and had it
signed by random people at the GSoC mentor summit. Some time after
that I revoked the old key. I do not believe it had been compromised,
but I no longer wanted people using it since it was old and somewhat
weak.

I just now re-signed the 2.10.11 tarballs and updated the asc files to
Sourceforge. Sorry for now doing that sooner!

Old key ID: 4C292FCC
New key ID: A40AB77B
Info about the keys:
https://sks-keyservers.net/pks/lookup?op=vindex&search=doliner
2.10.11 file list: https://sourceforge.net/projects/pidgin/files/Pidgin/2.10.11/